#!/bin/bash
#

if [ -z $1 ];then
   echo "帮助: $0 <linux|windows|mac|other>"
   exit 2
fi

case $1 in 
   linux|Linux)
     echo "红帽"
	;;
   windows|Windows)
     echo "微软"
	;;
   mac|Mac)
     echo "苹果"
	;;
   *)
     echo "其他"
	;;
esac
